lkml.org 
[lkml]   [2013]   [Feb]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH v2 09/14] mfd: omap-usb-host: Add device tree support and binding information
On Thu, Feb 07, 2013 at 04:02:49PM +0000, Roger Quadros wrote:
> Allows the OMAP HS USB host controller to be specified
> via device tree.
>
> CC: Samuel Ortiz <sameo@linux.intel.com>
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
> .../devicetree/bindings/mfd/omap-usb-host.txt | 80 ++++++++++
> drivers/mfd/omap-usb-host.c | 160 +++++++++++++++++++-
> 2 files changed, 234 insertions(+), 6 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/mfd/omap-usb-host.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-host.txt b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
> new file mode 100644
> index 0000000..b381fa6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
> @@ -0,0 +1,80 @@
> +OMAP HS USB Host
> +
> +Required properties:
> +
> +- compatible: should be "ti,usbhs-host"
> +- reg: should contain one register range i.e. start and length
> +- ti,hwmods: must contain "usb_host_hs"
> +
> +Optional properties:
> +
> +- num-ports: number of USB ports. Usually this is automatically detected
> + from the IP's revision register but can be overridden by specifying
> + this property. A maximum of 3 ports are supported at the moment.
> +
> +- portN-mode: String specifying the port mode for port N, where N can be
> + from 1 to 3. If the port mode is not specified, that port is treated
> + as unused. When specified, it must be one of the following.
> + "ehci-phy",
> + "ehci-tll",
> + "ehci-hsic",
> + "ohci-phy-6pin-datse0",
> + "ohci-phy-6pin-dpdm",
> + "ohci-phy-3pin-datse0",
> + "ohci-phy-4pin-dpdm",
> + "ohci-tll-6pin-datse0",
> + "ohci-tll-6pin-dpdm",
> + "ohci-tll-3pin-datse0",
> + "ohci-tll-4pin-dpdm",
> + "ohci-tll-2pin-datse0",
> + "ohci-tll-2pin-dpdm",
> +
[...]

> +/**
> + * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
> + * to the device tree binding portN-mode found in
> + * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
> + */
> +static const char *port_modes[] = {
> + [OMAP_USBHS_PORT_MODE_UNUSED] = "",
> + [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy",
> + [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll",
> + [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic",
> + [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0",
> + [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm",
> + [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0",
> + [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm",
> + [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0",
> + [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm",
> + [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0",
> + [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm",
> + [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0",
> + [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm",
> +};
> +
> +/**
> + * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode'
> + * from the port mode string.
> + * @mode: The port mode string, usually obtained from device tree.
> + *
> + * The function returns the 'enum usbhs_omap_port_mode' that matches the
> + * provided port mode string as per the port_modes table.
> + * If no match is found it returns -ENODEV
> + */
> +static const int omap_usbhs_get_dt_port_mode(const char *mode)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(port_modes); i++) {
> + if (!strcasecmp(mode, port_modes[i]))
> + return i;
> + }

Any reason for using strcasecmp rather than strcmp? The binding only specified
lower case versions, and this allows people to write "oHcI-PhY-6PiN-DaTsE0"
with impunity.

Otherwise, this looks fine to me.

Thanks,
Mark.



\
 
 \ /
  Last update: 2013-02-11 13:21    [W:0.142 / U:0.512 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site